﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Bai_3_C_sharp
{
    class Rectangle
    {
        int width, height;
        public Rectangle()
        {
            width = 5;
            height = 5;
        }
        public Rectangle(int a,int b)
        {
            width = a;
            height = b;
        }
        public int area()
        {
            return width * height;
        }                                                                                                           
    }
}
